[Asterisk-Users] IAX G729 Codec

[Steven Critchfield]

On Wed, 2003-07-09 at 23:30, Jay Tyndall wrote:
> This is going across a 256k/64 to a 512k/128.
> They are about 2 hops away from each other and ping times are sub 70ms.
> (Even when the * audio is playing)

What kind of slow as hell routers are you using? The ping times from my
office to home is in the 50ms range and at 17 hops and a tour of the
south east US. According to mapquest, using just city names, my route is
~2k miles one way.

BTW, my problems where on our private T1 line that sees round trips in
the 4ms range. Our semi educated guess was that we had a problem with
the jitter buffer causing echo cancel to go nutty when our ping times
would occasionally jump to 20ms. When I turned off the jitter buffer,
the call quality became so clear that people don't believe we are VoIP. 

> ----- Original Message ----- 
> From: "Steven Critchfield" <critch at basesys.com>
> To: <asterisk-users at lists.digium.com>
> Sent: Thursday, July 10, 2003 12:02 PM
> Subject: Re: [Asterisk-Users] IAX G729 Codec
> 
> 
> > On Wed, 2003-07-09 at 18:06, Jay Tyndall wrote:
> > > Hi,
> > >
> > > I have recently purchased some Asterisk G729 Codecs and installed them
> > > to overcome by bandwidth problem I was having with GSM.
> > >
> > > The G729 keeps the pings nice and low, but the audio stutters or
> > > jitters a fair bit.  (Starts and stops)
> > >
> > > Any Idea what would be causing this ?  I am just testing it using the
> > > OSS/Console at the moment, as I am waiting for my Digium cards to
> > > arrive.
> >
> > No zapata device for timing would probably be one thing.
> >
> > Also, what kind of network are you crossing? I have found some problems
> > when the network is not instantaneous, but not internet level lagging.
> > -- 
> > Steven Critchfield <critch at basesys.com>
> >
> > _______________________________________________
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> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> 
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-- 
Steven Critchfield <critch at basesys.com>